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Finding the Fourth Proportional to 12,959.20, 17,871.96 and 8,481.52

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Solution

The fourth proportional to 12,959.20, 17,871.96 and 8,481.52 is: 11,696.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,959.20 : 17,871.96 = 8,481.52 : x
  2. Step 2: Convert to fraction form
    12,959.20/17,871.96 = 8,481.52/x
  3. Step 3: Cross multiply
    12,959.20x = 17,871.96 × 8,481.52
  4. Step 4: Simplify right side
    12,959.20x = 151,581,386.18
  5. Step 5: Solve for x
    x = 151,581,386.18/12,959.20
  6. Step 6: Final answer
    x = 11,696.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.